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                                                             EXHIBIT 10(iii)A(8)

                                  AMENDMENT OF
                        ASPIRATION ACHIEVEMENT INCENTIVE
                                 AWARD AGREEMENT
                                       AND
                                  ELECTION FORM



     WHEREAS, the undersigned  Participant was granted an Aspiration Award under
the NSI Long-Term  Achievement  Incentive Plan (the "Plan") for the  Performance
Cycle ending August 31, 1999; and

     WHEREAS,  under the Plan, the amount (if any) of the  Aspiration  Award the
Participant will receive for such Performance Cycle is currently uncertain; and

     WHEREAS, the Plan has been amended to permit the Participant to receive all
or a portion of the Aspiration Award in a different form;

     NOW,  THEREFORE,  the  Participant  hereby elects to receive any Aspiration
Award earned for the  Performance  Cycle ending  August 31, 1999,  in the manner
provided below and agrees to amend the Aspiration  Achievement  Incentive  Award
Agreement in accordance with such election:

     I. AMENDMENT TO SURRENDER / EXCHANGE  AWARD (OR PORTION  THEREOF) FOR STOCK
OPTIONS.  By checking  "YES" below,  you are  electing to amend your  Aspiration
Achievement  Incentive Award  Agreement for the Performance  Cycle ending August
31, 1999 to provide that your Award (or a portion  thereof) will be exchanged as
indicated,  to the fullest extent possible,  for the grant of Options to acquire
NSI stock under the terms set forth below.

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                                                             EXHIBIT 10(iii)A(8)


     Originally,  one-half of the Aspiration Award,  determined as of August 31,
1999,  was to have been paid in cash and one-half in NSI stock.  If you elect to
amend your Agreement,  the value of the component of your Aspiration Award which
would have  originally  been paid in NSI stock will be  adjusted  to reflect any
change  in  NSI's  stock  price  during  the  period  August  31,  1999  to  the
Determination  Date (meaning  that date in October,  1999 on which the Executive
Resource and  Compensation  Committee of the Board of Directors  determines  the
amount of the Award  earned and  payable).  The total  value of the Award at the
Determination Date will therefore be equal to the total of (a) the amount of the
Award as of August 31, 1999 and (b) the amount (either gain or loss)  calculated
by multiplying  (i) the number of shares you would have  originally  received by
(ii) the amount resulting from subtracting the Fair Market Value of NSI stock on
August 31 from the Fair Market Value at the Determination Date.

     The amount of your  Aspiration  Award  exchanged  for  Options  will not be
currently taxable (i.e., it will be treated similarly to a bonus deferral).  The
Options will be nonqualified  options under the Plan. Please see the description
of the tax treatment for nonqualified options attached hereto as Exhibit "1". Of
course, you should consult your tax advisor.

_____ YES, I elect to amend my  Agreement  to provide for the exchange of all of
my Award (or a portion thereof),  to the fullest extent possible,  for the grant
of  Options  to  acquire  NSI stock  under the  terms  set forth  below,  in the
following manner:

      [ ]  In exchange for $__________ of my Award (minimum $1,000).

      [ ]  In exchange for _________% of my Award (minimum $1,000).

      [ ]  In exchange for the grant of _________ Options (minimum 100 options).

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                                                             EXHIBIT 10(iii)A(8)


The portion of the Award elected above (whether measured in dollars, percentage,
or  Options)  will be  surrendered  from the  total  value  of the  Award at the
Determination  Date. The  calculation of Options granted in the exchange will be
rounded down to the next whole  amount.  Any  unexchanged  portion of your Award
will be payable half in NSI stock and half in cash.

_____ NO, I elect to continue to receive the entire  Award  payment  half in NSI
stock and half in cash.



Terms of Stock Options:

          (a) Each  Option  will be valued for  purposes  of the  surrender  and
     exchange at a percentage,  as provided  below,  of the Fair Market Value of
     NSI stock (closing price on NYSE) on the Determination Date:

               (1) At  24.35%,  if the Fair  Market  Value of NSI stock is below
          $40.00 on the Determination Date;

               (2) At 20.00%, if the Fair Market Value of NSI stock is $40.00 or
          greater on the Determination Date.

     This  value  is  less  than  the  Black-Scholes  formula  to  be  used  for
     determining an annual option grant award.

          (b) The exchange will be limited by the size of your Award payment and
     may be further reduced,  on a pro rata basis, for Options elected in excess
     of the number of Options  granted to you in  September  1998 (or a fraction
     thereof  determined by the  Committee on the  Determination  Date),  if the
     total  number of Options  elected by all  participants  exceeds the pool of
     Options  available for exchange.  It is the intention of the Committee that
     300,000 Options will be available for exchange. The final number of Options
     available will be established by the Committee at the  Determination  Date,
     and your election  will be adjusted in accordance  with the final number of
     Options available.

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                                                             EXHIBIT 10(iii)A(8)



          (c) The Options  will be  nonqualified  stock  options,  will be fully
     vested at the time of  receipt,  and will have a  ten-year  term  except as
     follows:

               (1)  in  the  case  of  termination  due  to  death,  Disability,
          retirement  at or after  age 65,  or  involuntary  termination  by the
          Company  (other than for cause),  the Options will remain  exercisable
          until seven years after the date of grant,  or one year after the date
          of termination, whichever is later;

               (2) in the case of voluntary termination, the Options will remain
          exercisable  until 90 days after the date of  termination;  and

               (3) in the  case of  involuntary  termination  for  "cause",  the
          Options will expire on the date of termination.

     The Options  will  generally  have such other terms and  conditions  as the
     nonqualified Options granted by the Company in September 1998.

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                                                             EXHIBIT 10(iii)A(8)


               II.  SIGNATURE.  Sign and date this form  below and  return it to
          Helen Haines.




               The undersigned hereby agrees to amend the Aspiration Achievement
          Incentive Award Agreement in accordance with the election in I. above.





                                   ---------------------------------------------
                                   (Grantee)



                                   ---------------------------------------------
                                    Date
Received and Award Agreement
Amendment approved
on behalf of
National Service Industries, Inc.:


By:____________________________________
              Helen D. Haines

- ---------------------------------------
                  Date

                                                                         Page 59
                                                             EXHIBIT 10(iii)A(8)
                                                                       EXHIBIT 1
                                  TAX TREATMENT




         Nonqualified Stock Options ("NSOs").  On exercise of an NSO, the amount
by which the  market  price of the Shares on the date of  exercise  of the Stock
Option  exceeds the purchase  price for the Shares will  generally be taxable to
the  Participant  as ordinary  income and will  generally be deductible  for tax
purposes by NSI. Selling or transferring the Shares acquired upon exercise of an
NSO will  generally  result in a capital gain or loss for the  Participant,  but
will have no tax  consequences for NSI. The gain or loss will be measured by the
difference  between the amount realized on disposition of the Shares and the tax
basis of the Shares. The tax basis for the Shares will generally be equal to the
amount taken into ordinary  income upon  exercise of the Stock Option,  plus the
amount of cash paid by the Participant  upon exercise of the Stock Option (which
will in the  aggregate  generally  be equal to the market price of the Shares at
the time the Stock Option was exercised).

         Aspiration  Awards.  The grant of an Aspiration  Award  pursuant to the
Plan will not result in income for the  Participant  or in a tax  deduction  for
NSI.  Upon the  settlement  of such an Award,  the  Participant  will  recognize
ordinary  income  equal to the fair market  value of any Shares  and/or any cash
received and NSI will be entitled to a tax deduction in the same amount.